* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: rgba(255,255,255,0);
}
body {
  line-height: 1.5;
  font-family: 'Noto Sans';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  color: #1a1a1a;
  background: #1a1a1a;
    font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", "FontAwesome", sans-serif;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}
.nav {
  will-change: transform;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1;
  background: #1a1a1a;
  -webkit-transform: translateY(-100%);
      -ms-transform: translateY(-100%);
          transform: translateY(-100%);
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.nav--active {
  -webkit-transform: translateY(0);
      -ms-transform: translateY(0);
          transform: translateY(0);
}
.nav__list {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}
.nav__item {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
      -ms-flex: 1;
          flex: 1;
  position: relative;
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.nav__item:hover {
  opacity: 0.75;
}
.nav__thumb {
  display: block;
  height: 120px;
  background: #dc143c;
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.nav__thumb:before {
  content: attr(data-letter);
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
      -ms-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  font-size: 70px;
  text-transform: uppercase;
  opacity: 0.15;
}
.nav__label {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
      -ms-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #1a1a1a;
  margin: 0;
}
@media (max-width: 850px) {
  .nav__label {
    font-size: 14px;
  }
}
@media (max-width: 720px) {
  .nav__label {
    display: none;
  }
  .nav__thumb {
    height: 90px;
  }
  .nav__thumb:before {
    font-size: 32px;
    opacity: 0.7;
  }
}
.burger {
  position: absolute;
  right: 0;
  top: 100%;
  width: 60px;
  height: 60px;
  background: #1a1a1a;
  cursor: pointer;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.burger__patty {
  position: relative;
  width: 60%;
  height: 2px;
  background: #fff;
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.burger__patty:before,
.burger__patty:after {
  will-change: transform;
  content: "";
  position: absolute;
  left: 0;
  background: #fff;
  height: 2px;
  width: 100%;
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.burger__patty:before {
  top: -10px;
}
.burger__patty:after {
  top: 10px;
}
.burger--close .burger__patty {
  -webkit-transform: rotate(45deg);
      -ms-transform: rotate(45deg);
          transform: rotate(45deg);
}
.burger--close .burger__patty:before {
  -webkit-transform: rotate(-90deg) translate(-9px, 0);
      -ms-transform: rotate(-90deg) translate(-9px, 0);
          transform: rotate(-90deg) translate(-9px, 0);
}
.burger--close .burger__patty:after {
  opacity: 0;
  -webkit-transform: scaleX(0);
      -ms-transform: scaleX(0);
          transform: scaleX(0);
}
.page {
  height: 100vh;
  will-change: transform;
  -webkit-perspective: 400px;
          perspective: 400px;
  overflow: hidden;
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.section {
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
  height: 100vh;
  overflow: hidden;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  text-align: center;
  background-color: transparent;
  -webkit-transform: translateX(100%);
      -ms-transform: translateX(100%);
          transform: translateX(100%);
  -webkit-transition: all 0.05s cubic-bezier(0.23, 1, 0.32, 1);
}
.section--hidden {
  -webkit-transform: translateX(-100%);
      -ms-transform: translateX(-100%);
          transform: translateX(-100%);
}
.section--active {
  -webkit-transform: translateX(0) rotateY(0);
          transform: translateX(0) rotateY(0);
  z-index: 2;
}

.section__wrapper {
  width: 100%;
  max-width: 800px;
  padding: 0 8vw;
}
.section__title {
  margin: 0 0 25px 0;
  font-size: 24px;
  text-transform: uppercase;
  letter-spacing: 4px;
}
.section p {
  margin: 0 0 25px 0;
  font-family: 'Georgia';
  font-size: 20px;
}
.section p:last-child {
  margin-bottom: 0;
}
.color1 {
  background: #1abc9c;
}
.color2 {
  background: #e74c3c;
}
.color3 {
  background: #3498db;
}
.logo {
  position: fixed;
  top: 195px;
  right: 7px;
  z-index: 2;
}
@media (max-width: 720px) {
  .logo {
    top: 160px;
  }
}
.logo img {
  width: 45px;
  -webkit-transform: rotate(0);
      -ms-transform: rotate(0);
          transform: rotate(0);
  -webkit-transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
          transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.logo img:hover {
  -webkit-transform: rotate(180deg) scale(1.1);
      -ms-transform: rotate(180deg) scale(1.1);
          transform: rotate(180deg) scale(1.1);
}